ENVISAT Advanced Synthetic Aperture Radar (ASAR) UK imagery

Data from the Advanced Synthetic Aperture Radar (ASAR) on-board ENVISAT are available for the UK from 2002-2009. The raw data for the alternating polarisation, wide swath and image modes were acquired by the Landmap project from ESA and processed to produce 8 and 32-bit greyscale and multi-difference colour composite geotiff images. The Joint Information Systems Committee (JISC) funded Landmap service which ran from 2001 to July 2014 collected and hosted a large amount of earth observation data for the majority of the UK. After removal of JISC funding in 2013, the Landmap service is no longer operational, with the data now held at the NEODC.



When using these data please also add the following copyright statement: © ESA 2004/2005/2006/2007/2008…. Received and Distributed by University of Manchester under licence from the European Space Agency

Simple

Date (Publication)
2014-08-18T08:16:07
Date (Creation)
2014-08-18T08:16:07
Citation identifier
https://catalogue.ceda.ac.uk/uuid/86a063c7f894cd9eceb6e542888a13ea
Citation identifier
NERC Earth Observation Data Centre (NEODC) / 86a063c7f894cd9eceb6e542888a13ea
Point of contact
Organisation name Individual name Electronic mail address Role

Landmap

unknown

 		Author

European Space Agency (ESA)

unknown

 		Author

NERC Earth Observation Data Centre (NEODC)

neodc@rl.ac.uk

Custodian

NERC Earth Observation Data Centre (NEODC)

neodc@rl.ac.uk

Distributor

NERC Earth Observation Data Centre (NEODC)

neodc@rl.ac.uk

pointofContact

NERC Earth Observation Data Centre (NEODC)

neodc@rl.ac.uk

Publisher
Maintenance and update frequency
Not planned
Update scope
Dataset
Keywords

  • Not defined

GEMET - INSPIRE themes, version 1.0

  • orthoimagery
Access constraints
Other restrictions
Other constraints
Restricted data: please submit an application using the REQUEST ACCESS link for access.
Use constraints
Other restrictions
Other constraints
Under the following licence https://artefacts.ceda.ac.uk/licences/specific_licences/landmap.pdf, appropriate use of these data may fall under academic and specific use. This message is intended as guidance, always read the full licence. When using these data you must cite them correctly using the citation given on the CEDA Data Catalogue record.
Spatial representation type
Grid
Language
English
Topic category
  • Imagery base maps earth cover
N
S
E
W
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Begin date
2002-01-01T00:00:00
End date
2009-12-31T00:00:00
Unique resource identifier
WGS 84
Distribution format
Name Version

Data availability and file format

The data are available in geotiff format which can be opened in many earth observation image processing software including open/free software such as Erdas ER viewer and the freely available Basic ERS & Envisat (A)ATSR and Meris Toolbox (BEAM) or NEST (Next ESA SAR Toolbox). Geotiff files are TIFF files which have geographic metadata embedded as tags within the TIFF file. The geographic metadata can then be used to position the image in the correct location and geometry on the screen of a geographic information display. The data are split into the three modes acquired by Landmap (alternating polarisation, wide swath and image modes). The various polarisations can be determined from the filename:



hh - Horizontal polarisation transmitted, horizontal received.

vv - Vertical transmitted, vertical received

hv - Horizontal transmitted, vertical received

vh - Vertical transmitted, horizontal received



Specific products include 32 bit _geo GeoTiff, and 8 bit _geo_lia and _geo_ls_mask GeoTiffs. All the geotiff images are provided with GeoTiff World Files (.tfw) which are used to geo-reference images to an appropriate projection scheme.

Distributor contact
Organisation name Individual name Electronic mail address Role

NERC Earth Observation Data Centre (NEODC)

neodc@rl.ac.uk

Distributor
OnLine resource
Protocol Linkage Name
https://catalogue.ceda.ac.uk/uuid/86a063c7f894cd9eceb6e542888a13ea

CEDA Data Catalogue Page
OnLine resource
Protocol Linkage Name
http://data.ceda.ac.uk/neodc/landmap/data/radar/asar

DOWNLOAD
OnLine resource
Protocol Linkage Name
http://www.esa.int/esapub/bulletin/bullet102/Desnos102.pdf

ASAR specifications and details
OnLine resource
Protocol Linkage Name
https://earth.esa.int/web/guest/missions/esa-operational-eo-missions/envisat/instruments/asar

The ESA ASAR website
OnLine resource
Protocol Linkage Name
http://www.neodc.rl.ac.uk/conditions/landmap.html

Landmap terms of use
OnLine resource
Protocol Linkage Name
https://earth.esa.int/pub/ESA_DOC/ENVISAT/ASAR/asar.ProductHandbook.2_2.pdf

ASAR product handbook
Hierarchy level
Dataset

Conformance result

Title

Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services

Date (Publication)
2010-12-08
Statement

Data collected and prepared by the Landmap team before a copy of the data were obtained by NEODC directly from Landmap.

Metadata

File identifier
86a063c7f894cd9eceb6e542888a13ea XML
Metadata language
English
Character set
UTF8
Parent identifier
Landmap: Radar Earth Observation Collection

47edf6f8790da0ebb5080feb810a630e
Hierarchy level
Dataset
Date stamp
2026-02-16T03:02:58
Metadata standard name
UK GEMINI
Metadata standard version

2.3
Metadata author
Organisation name Individual name Electronic mail address Role

NERC Earth Observation Data Centre (NEODC)

neodc@rl.ac.uk

Point of contact
 
 

Overviews

Spatial extent

thumbnail

Keywords

GEMET - INSPIRE themes, version 1.0

orthoimagery


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